[5 in 1 Water Quality Test] The pH meter is designed with 4 in 1 function, which can simultaneously measure PH, TDS, EC, salinity and temperature with great precision. Omnidirectional water quality measurement to ensure water quality health. [Precise measurement]: In order to achieve high accuracy, it is equipped with a high-quality titanium alloy probe and reliable automatic temperature compensation (ATC), which can ensure accurate reading at different temperatures. [Auto power off function] Auto power off function cuts off the power after 5 minutes without any operation to save power. [IP67 waterproof rating] IP67 is an international waterproof and dustproof certification. Protection against dust intrusion, short time immersion. [Wide range of uses]: This water quality detector is ideal for testing water, swimming pools, aquariums, spas, hydroponics, laboratory and drinking water, etc.